Question

During the electrolysis of molten lead bromide, which of the following takes place?

• A. Bromine is released at the cathode.
• B. Lead is deposited at the anode.
• C. Bromine ion gains an electron.
• D. Lead is deposited at the cathode

Answer 1

The correct option is D

Lead is deposited at the cathode

Electrolysis of Lead Bromide

Lead bromide ($\mathit{P}\mathit{b}\mathit{B}{\mathit{r}}_{\mathbf{2}}$) undergoes electrolysis to produce lead (Pb) at the cathode and Bromine at the anode. The electrolysis reaction of Lead bromide is,

$$\begin{gathered} Cathode:\underset{Leadion}{P{b}^{2+}}+2e^{-}\to \underset{Lead}{Pb} \\ Anode:\underset{Bromide}{B{r}^{-}}\to Br+e^{-} \end{gathered}$$

Since Lead is deposited at the cathode during electrolysis of molten lead bromide. Option D is correct.